Construct LazyString in error paths for tridiag (#54648)
Similar to https://github.com/JuliaLang/julia/pull/54631, this would
help reduce dynamic dispatches involved in concatenating a `String` and
a `LazyString`.
These show up in
```julia
julia> @report_opt Tridiagonal(rand(1), rand(2), rand(1)) \ rand(2)
[ Info: tracking Base
┌ Warning: skipping var"#sprint#594"(context, sizehint::Integer, ::typeof(sprint), f::Function, args...) @ Base strings/io.jl:107 to avoid parsing too much code
└ @ Revise ~/.julia/packages/Revise/bAgL0/src/packagedef.jl:1092
┌ Warning: skipping (::Base.var"#120#121")(io) @ Base strings/lazy.jl:84 to avoid parsing too much code
└ @ Revise ~/.julia/packages/Revise/bAgL0/src/packagedef.jl:1092
═════ 1 possible error found ═════
┌ \(A::Tridiagonal{Float64, Vector{Float64}}, B::Vector{Float64}) @ LinearAlgebra /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-11/usr/share/julia/stdlib/v1.11/LinearAlgebra/src/generic.jl:1132
│┌ lu(::Tridiagonal{Float64, Vector{Float64}}) @ LinearAlgebra /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-11/usr/share/julia/stdlib/v1.11/LinearAlgebra/src/lu.jl:341
││┌ lu(::Tridiagonal{Float64, Vector{Float64}}; kwargs::@Kwargs{}) @ LinearAlgebra /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-11/usr/share/julia/stdlib/v1.11/LinearAlgebra/src/lu.jl:341
│││┌ _lucopy(A::Tridiagonal{Float64, Vector{Float64}}, T::Type{Float64}) @ LinearAlgebra /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-11/usr/share/julia/stdlib/v1.11/LinearAlgebra/src/lu.jl:351
││││┌ copymutable_oftype(A::Tridiagonal{Float64, Vector{Float64}}, ::Type{Float64}) @ LinearAlgebra /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-11/usr/share/julia/stdlib/v1.11/LinearAlgebra/src/LinearAlgebra.jl:463
│││││┌ similar(M::Tridiagonal{Float64, Vector{Float64}}, ::Type{Float64}) @ LinearAlgebra /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-11/usr/share/julia/stdlib/v1.11/LinearAlgebra/src/tridiag.jl:603
││││││┌ Tridiagonal(dl::Vector{Float64}, d::Vector{Float64}, du::Vector{Float64}) @ LinearAlgebra /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-11/usr/share/julia/stdlib/v1.11/LinearAlgebra/src/tridiag.jl:520
│││││││┌ Tridiagonal{Float64, Vector{Float64}}(dl::Vector{Float64}, d::Vector{Float64}, du::Vector{Float64}) @ LinearAlgebra /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-11/usr/share/julia/stdlib/v1.11/LinearAlgebra/src/tridiag.jl:477
││││││││┌ string(::String, ::String, ::LazyString) @ Base ./strings/io.jl:189
│││││││││┌ print_to_string(::String, ::String, ::LazyString) @ Base ./strings/io.jl:148
││││││││││┌ print(io::IOBuffer, s::LazyString) @ Base ./strings/io.jl:195
│││││││││││┌ iterate(s::LazyString) @ Base ./strings/lazy.jl:94
││││││││││││┌ String(l::LazyString) @ Base ./strings/lazy.jl:83
│││││││││││││┌ sprint(::Base.var"#120#121"{LazyString}) @ Base ./strings/io.jl:107
││││││││││││││┌ sprint(::Base.var"#120#121"{LazyString}; context::Nothing, sizehint::Int64) @ Base ./strings/io.jl:114
│││││││││││││││┌ (::Base.var"#120#121"{LazyString})(io::IOBuffer) @ Base ./strings/lazy.jl:85
││││││││││││││││ runtime dispatch detected: print(io::IOBuffer, %16::Any)::Any
│││││││││││││││└────────────────────
```
Co-authored-by: Shuhei Kadowaki <40514306+aviatesk@users.noreply.github.com>
Co-authored-by: Dilum Aluthge <dilum@aluthge.com>
